September i, 1904.] 



THE INDIA RUBBER WORLD 



427 



SUCCESSFUL BRAZING OF CAST IRON. 



RUBBER manufacturers have ever been sufferers from the 

 breakage of mill and calender rolls, frames, and gear 

 teeth, which, made of cast iron could not be mended, but had 

 to be replaced. Aside from the cost of replacement, there was 

 often a troublesome and expensive delay while new parts were 

 being cast, finished and delivered. 



BROKEN CALENDER ROLL BEFORE BRAZING. 



By what is known as the •' Tichon " process any break in 

 cast iron may be mended, leaving the parts stronger than be- 

 fore, and the original lines of the castings preserved intact. To 

 do this the fractured parts are first cleansed, after which a 

 brazing compound or alloy is applied, followed by the applica- 



CALENDER ROLL AFTER BRAZING 



tion of heat by means of a gas and air jet. The process is so 

 simple that it may be installed in any factory, and for those 

 who do not care to acquire shop rights, there are now being 

 established brazing stations in all large centers where any type 

 of repair work in cast iron will be done. 



The cost of such repairing is far less than that of replacement, 

 and any job can be finished in a few hours' time. In the illus- 

 trations accompanying this there is shown a 6 foot calender 



roll 20 inches in diameter, which after being broken in two 

 was successfully brazed together and is now running on fine 

 work, showing no weakness nor sign of having been mended. 

 This work, which is sure to be of interest to the whole rubber 

 trade, is done by the Standard Brazing Co., No. 131 State 

 street, Boston. 



RUBBER PAVING IN LONDON. 



THE frequent newspaper references of late to the great field 

 for the use of rubber in paving streets took their start 

 from the paving with rubber of the courtyard of the Savoy 

 Hotel, in London, about the first of May. A recent report by 

 the United States consul general at London, Mr. H. Clay 

 Evans, gives some details of interest regarding the Savoy 

 Hotel pavement, and also the older example of rubber paving 

 under the hotel at Euston station, in London. 



The paving at Euston station was laid down in 1881 by Kirk 

 & Randall, the contractors for the extension of the hotel, at a 

 cost per square yard stated as follows: 



Concrete foundation work $ 5.60 



Rubber paving, supplied by Charles Macintosh & Co., Limited. 27.10 



Total approximate cost $32.70 



When the rubber was laid down it was 2 inches in thickness. 

 In May, 1902, after twenty-one years' the portion on the incom- 

 ing road into the station was taken up and carefully examined, 

 when it was found to have worn down to about % inch in 

 the thinnest place, namely, at the incoming end, where horses 

 first step onto it from the macadamized road. Other parts of 

 the rubber were worn down to 1 inch and \% inches, these 

 places in each case being near the center of the roadway. Re- 

 newal of a portion of the pavement was therefore considered 

 necessary. 



Tenders were invited in August, 1902, from four firms, and 

 the prices named varied from £5 lis. 4//, [ = $27.09] to ,£17 10s. 

 },d. [=$86 22] per square yard, Messrs. Macintosh's price being 

 £io is. 6<i. [$49.26]. It may be mentioned that since 1881 rub- 

 ber had advanced materially in price. The lowest tender was 

 accepted, that of the India Rubber, Gutta Percha, and Tele- 

 graph Works Co., Limited. The total cost of the renewal in 

 1902 was $28.75 per square yard, including laying, after credit 

 had been given for the old rubber taken up. It is stated that 

 since 1881 the average yearly cost of examination and mainte- 

 nance of the Euston rubber pavement has been slightly under 

 y,id. per square yard. 



The recent paving of the Savoy Hotel courtyard was done 

 by James Stewart & Co. The area of the courtyard is 3750 

 square feet, of which 2195 were covered with rubber. The rub- 

 ber used was 2 inches thick, weighing 15X pounds per square 

 foot, and it was laid on a concrete foundation, finished with 

 cement floating to make it smooth. The cost of the material 

 laid, without including the foundation, was i8.r. 8</. per foot, or 

 /8 8s. [=$40.78] per yard, which will be seen to have been 

 considerably higher than the cost at Euston station. The rub- 

 ber used at the Savoy Hotel was furnished by Charles Macin- 

 tosh & Co., Limited, at a total cost of £2000 [=$97331- 



It may be added that the conditions under which the above 

 mentioned pavements are used do not compare with those of 

 ordinary streets. While they are in constant use, and the traffic 

 at Euston station is very heavy, the only wheels passing over 

 the rubber are those of passenger vehicles, and these nowadays 

 are mostly rubber tired. Both at the hotel at Euston station 

 and in the Savoy Hotel courtyard the rubber pavement is 

 under a roof. 



